4. When should the population be 630,7357 The population should be 630,735 in the year 5, How long will it take the population to double? Round to 2 decimal places, Pop, will double inSection 4.6 - Modeling with Exponential and Logarithm Functions The population of Collin County, which follows the exponential growth model, increased from 264,036 in 1990 to 491,675 in 2000. Use this information for Questions 1 -5. 1. Find the exponential growth rate, k. Round answer to 4 decimal places. km 2. Write the exponential growth function using k from Question 1= 3. What should the population be in 20127 Round to 0 decimal places. Pop. in 2012 =